Improvement in fire-proof shutters



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' Fire-Prfoof Shutters. No, 143,157, Patented September23,'l873.

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, Fire-Prnof Shutters. NO. 143,157. Patented September23,1873.

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NITED STATES PATENT OFFICE;

yTEEonoEE HYATT, on NEW Yonk, N. Y.

IMPROVEMENT IN FIRE-PROOF SHUTTERS.

Specification forming part of Letters Patent No. 143,157, datedSeptember 23, 1873; application filed September 3, 1873.

To all whom it may concern:

Beit known that I, THEononE HYATT, of New York city, in the county ofNew York and in the State of New York, have invented certain new anduseful Improvements in Fire- Proof Shutters; and do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the accompanying drawing making a part of thisspecification, in Which- Y Figure l is a perspective view of awindowopening provided with my improved shutters. Fig. 2 is a horizontalsection of a shutter protected upon its outer side with non-conductin gmaterial, and Fig. 3 is a like view of a shutter having both of itssides protected.

Letters of like name and kind refer to like parts in each of the gures.

As ordinarily constructed, metal shutters, when exposed to the action ofheat, are warped and their form so changed as to render them useless forthe prevention of injury to the interior` of a building during a fire.Many attempts have been made to protect the `metal from such injuriousaction by the apter that shall be capable of withstanding successfullythe action of fire is the design of my invention, which consists in ametal shutter having one or both of its sides covered with sheets orboards of asbestus combined with earthy material, or its equivalent, inthe manner and for the purpose substantially as is hereinafterspeciiied.

In the annexed drawings, A represents a shutter constructed of or fromtwo sheets of metal, B and G, the inner of which sheets, C,

is preferably corrugated, so as to increase the rigidity of saidshutter. Upon the outer side of the plate B is placed a sheet or board,D, composed of asbestus combined with earthy matter, or its equivalent,which board is secured in place by means of bolts or rivets d, that passhorizontally through" the same and through the metal portions of theshutter at suitable points around its edge, and, if desired, within itscentral portion.

rlhe hinges E may be secured upon the outer side of the shutter, as seenin Fig. l; or, if desired, they may be attached to or upon its innerface, so as to be removed from the action of re.

The heat-resisting qualities of the asbestus ooverin g effectuallyprotects it from injury or chan ge by the action of fire, while its lowheattransmitting power renders impossible the inward passage of asuflicient quantity of heat to warp or injure the metal portion of theshutter.

In case the shutter is used for inclosin g an opening in apartition-wall, or if it is desired to protect adjoining buildings froma possible re Within the building having the shutters, the inner sidesof the latter may be covered with asbestus board, as seen in Fig. 8.

Any desired finish may be given to the exterior of the shutter bypainting, lacquering, marbleizing, or in any ordinary manner coveringthe same.

The shutter thus described possesses the advantage of absolute safetyfrom injury by external heat, is a perfect protection to the buildj ingfrom the same, and can possess all the burglar-resisting qualitiesrequired, without Witnesses:

E. P. STARR, WILLIAM AGKEEMAN.

